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package com.taobao.android.builder.tasks.tpatch;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Callable;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import com.android.build.gradle.internal.api.AppVariantContext;
import com.android.build.gradle.internal.api.AppVariantOutputContext;
import com.android.build.gradle.internal.core.GradleVariantConfiguration;
import com.android.build.gradle.internal.scope.ConventionMappingHelper;
import com.android.build.gradle.internal.tasks.BaseTask;
import com.android.build.gradle.internal.variant.ApkVariantOutputData;
import com.android.build.gradle.internal.variant.BaseVariantOutputData;
import com.taobao.android.builder.AtlasBuildContext;
import com.taobao.android.builder.dependency.AtlasDependencyTree;
import com.taobao.android.builder.dependency.diff.DependencyDiff;
import com.taobao.android.builder.dependency.model.AwbBundle;
import com.taobao.android.builder.tasks.manager.MtlBaseTaskAction;
import com.taobao.android.builder.tools.bundleinfo.model.BundleInfo;
import com.taobao.android.builder.tools.manifest.ManifestFileUtils;
import com.taobao.android.object.ArtifactBundleInfo;
import com.taobao.android.object.DiffType;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.gradle.api.GradleException;
import org.gradle.api.tasks.InputDirectory;
import org.gradle.api.tasks.InputFile;
import org.gradle.api.tasks.Optional;
import org.gradle.api.tasks.OutputDirectory;
import org.gradle.api.tasks.TaskAction;

/**
 * Created by wuzhong on 16/6/24.
 */
public class DiffBundleInfoTask extends BaseTask {

    private AppVariantOutputContext appVariantOutputContext;

    private File apDir;

    private File manifestFile;

    private File outJsonFile;

    private DependencyDiff dependencyDiff;

    @OutputDirectory
    @Optional
    public File getOutJsonFile() {
        return outJsonFile;
    }

    @InputFile
    @Optional
    public File getManifestFile() {
        return manifestFile;
    }

    public DependencyDiff getDependencyDiff() {
        return dependencyDiff;
    }

    @InputDirectory
    @Optional
    public File getApDir() {
        return apDir;
    }

    /**
     * Generate this file
     */
    @TaskAction
    public void generate() throws IOException {

        dependencyDiff = getDependencyDiff();

        //If it's patch, get the diff operation
        if (null == dependencyDiff) {
            return;
        }

        try {
            appVariantOutputContext.artifactBundleInfos = getArtifactBundleInfo(getDependencyDiff(),
                                                                                getManifestFile(),
                                                                                getApDir());
            FileUtils.writeStringToFile(new File(getOutJsonFile(), "dependencyDiff.json"),
                                        JSON.toJSONString(dependencyDiff, true));
        } catch (Exception e) {
            throw new GradleException(e.getMessage());
        }
    }

    private Set<ArtifactBundleInfo> getArtifactBundleInfo(DependencyDiff dependencyDiff,
                                                          File mainfestFile,
                                                          File apDir) throws IOException, DocumentException {

        Set<ArtifactBundleInfo> artifactBundleInfos = new HashSet<ArtifactBundleInfo>();
        if (null == apDir) {
            throw new GradleException("No Ap dependency found!");
        }
        File apManifest = new File(apDir, "AndroidManifest.xml");
        String apVersion = null;
        try {
            apVersion = ManifestFileUtils.getVersionName(apManifest);
        } catch (Exception e) {
            throw new GradleException(e.getMessage(), e);
        }

        Map<String,String> tagMap = new HashMap<>();
        JSONObject jsonObject = (JSONObject)JSON.parse(FileUtils.readFileToString(new File(apDir, "atlasFrameworkProperties.json")));
        JSONArray jsonArray = jsonObject.getJSONArray("bundleInfo");
        for (JSONObject obj : jsonArray.toArray(new JSONObject[0])){
            tagMap.put(obj.getString("pkgName"), obj.getString("unique_tag"));
        }

        // 1. First add the main bundle
        ArtifactBundleInfo mainBundleInfo = getMainArtifactBundInfo(mainfestFile);
        mainBundleInfo.setBaseVersion(apVersion);
        mainBundleInfo.setMainBundle(true);
        mainBundleInfo.setVersion(appVariantOutputContext.getVariantContext()
                                          .getVariantConfiguration()
                                          .getVersionName());
        if (dependencyDiff.getMainDexDiffs().size() > 0) {
            mainBundleInfo.setDiffType(DiffType.MODIFY);
        } else {
            mainBundleInfo.setDiffType(DiffType.NONE);
        }

        mainBundleInfo.setSrcUnitTag(jsonObject.getString("unit_tag"));
        mainBundleInfo.setUnitTag(appVariantOutputContext.getVariantContext().unit_tag);

        artifactBundleInfos.add(mainBundleInfo);

        // 2. Add your own bundle
        AtlasDependencyTree atlasDependencyTree = AtlasBuildContext.androidDependencyTrees.get(
                appVariantOutputContext.getVariantContext().
                        getVariantConfiguration().getFullName());

        for (AwbBundle awbBundle : atlasDependencyTree.getAwbBundles()) {

            BundleInfo bundleInfo = awbBundle.bundleInfo;

            ArtifactBundleInfo awbBundleInfo = new ArtifactBundleInfo();
            awbBundleInfo.setMainBundle(false);
            awbBundleInfo.setDependency(bundleInfo.getDependency());
            awbBundleInfo.setPkgName(bundleInfo.getPkgName());
            awbBundleInfo.setApplicationName(bundleInfo.getApplicationName());
            awbBundleInfo.setArtifactId(awbBundle.getResolvedCoordinates().getArtifactId());
            awbBundleInfo.setName(bundleInfo.getName());
            //History bundle's tag todo
            awbBundleInfo.setSrcUnitTag(tagMap.get(bundleInfo.getPkgName()));
            awbBundleInfo.setUnitTag(bundleInfo.getUnique_tag());
            String version = bundleInfo.getVersion();
            if (version.indexOf("@") > 0) {
                String[] arr = version.split("@");
                version = arr[arr.length - 1];
            }
            awbBundleInfo.setVersion(version);

            //TODO
            bundleInfo.getUnique_tag();

            String libBundleName = getBundleName(awbBundle);
            if (dependencyDiff.getAwbDiffs().contains(libBundleName)) {
                if (dependencyDiff.getNewAwbs().contains(libBundleName)) {
                    awbBundleInfo.setDiffType(DiffType.ADD);
                } else {
                    awbBundleInfo.setDiffType(DiffType.MODIFY);
                }
            } else {
                awbBundleInfo.setDiffType(DiffType.NONE);
            }

            artifactBundleInfos.add(awbBundleInfo);
        }
        return artifactBundleInfos;
    }

    private String getBundleName(AwbBundle libraryDependency) {
        return libraryDependency.getResolvedCoordinates().getGroupId() +
                ":" +
                libraryDependency.getResolvedCoordinates().getArtifactId();
    }

    private static ArtifactBundleInfo getMainArtifactBundInfo(File manifestFile) {
        ArtifactBundleInfo mainBundleInfo = new ArtifactBundleInfo();
        SAXReader reader = new SAXReader();
        Document document = null;// Read the XML file
        try {
            document = reader.read(manifestFile);
        } catch (DocumentException e) {
            throw new GradleException(e.getMessage(), e);
        }
        Element root = document.getRootElement();// Get the root node

        List<? extends Node> metadataNodes = root.selectNodes("//meta-data");
        for (Node node : metadataNodes) {
            Element element = (Element) node;
            Attribute attribute = element.attribute("name");
            if (attribute.getValue().equals("label")) {
                Attribute labelAttribute = element.attribute("value");
                mainBundleInfo.setName(labelAttribute.getValue());
            }
        }

        List<? extends Node> applicatNodes = root.selectNodes("//application");
        for (Node node : applicatNodes) {
            Element element = (Element) node;
            Attribute attribute = element.attribute("name");
            if (attribute != null) {
                mainBundleInfo.setApplicationName(attribute.getValue());
            }
        }

        if ("manifest".equalsIgnoreCase(root.getName())) {
            List<Attribute> attributes = root.attributes();
            for (Attribute attr : attributes) {
                if (StringUtils.equalsIgnoreCase(attr.getName(), "versionName")) {
                    String versionName = attr.getValue();
                    mainBundleInfo.setVersion(versionName);
                }
            }
        }
        String pkgName = root.attributeValue("package");
        mainBundleInfo.setPkgName(pkgName);
        return mainBundleInfo;
    }

    public static class ConfigAction extends MtlBaseTaskAction<DiffBundleInfoTask> {

        private AppVariantContext appVariantContext;

        public ConfigAction(AppVariantContext appVariantContext,
                            BaseVariantOutputData baseVariantOutputData) {
            super(appVariantContext, baseVariantOutputData);
            this.appVariantContext = appVariantContext;
        }

        /**
         * Return the name of the task to be configured.
         */
        @Override
        public String getName() {
            return scope.getTaskName("diffBundleInfo");
        }

        /**
         * Return the class type of the task to be configured.
         */
        @Override
        public Class<DiffBundleInfoTask> getType() {
            return DiffBundleInfoTask.class;
        }

        /**
         * Performs this action against the given object.
         *
         * @param diffBundleInfoTask The object to perform the action on.
         */
        @Override
        public void execute(DiffBundleInfoTask diffBundleInfoTask) {

            super.execute(diffBundleInfoTask);

            if (!appVariantContext.getAtlasExtension().isAtlasEnabled()){
                diffBundleInfoTask.setEnabled(false);
            }

            final ApkVariantOutputData variantOutputData = (ApkVariantOutputData) scope.getVariantOutputData();
            final GradleVariantConfiguration config = scope.getVariantScope()
                    .getVariantConfiguration();

            ConventionMappingHelper.map(diffBundleInfoTask, "outJsonFile", new Callable<File>() {
                @Override
                public File call() throws Exception {
                    File file = scope.getVariantScope().getGlobalScope().getOutputsDir();
                    if (!file.exists()) {
                        file.mkdirs();
                    }
                    return file;
                }
            });

            ConventionMappingHelper.map(diffBundleInfoTask, "manifestFile", new Callable<File>() {
                @Override
                public File call() throws Exception {
                    return variantOutputData.manifestProcessorTask.getManifestOutputFile();
                }
            });

            //Set the DependencyDiff
            ConventionMappingHelper.map(diffBundleInfoTask,
                                        "dependencyDiff",
                                        new Callable<DependencyDiff>() {
                                            @Override
                                            public DependencyDiff call() throws Exception {
                                                return appVariantContext.getDependencyDiff();
                                            }
                                        });

            ConventionMappingHelper.map(diffBundleInfoTask, "apDir", new Callable<File>() {
                @Override
                public File call() throws Exception {

                    if (null != appVariantContext.apContext.getApExploredFolder() &&
                            appVariantContext.apContext.getApExploredFolder().exists()) {
                        return appVariantContext.apContext.getApExploredFolder();
                    }
                    return null;
                }
            });

            diffBundleInfoTask.appVariantOutputContext = getAppVariantOutputContext();
        }
    }
}
